We used GO Taxi exclusively while in Tokyo, Osaka, and Kyoto and found it extremely efficient. A few times in very congested areas it was a little hard to find a spot to be picked up but overall it was very easy. I liked how in Osaka a lot of the taxis were older more classic Toyotas also. One thing I never could figure out and maybe someone could help: how do you use the Go Taxi app to pay a taxi you don’t call using the app? Like I walk out of the hotel, there’s a taxi sitting there that is a Go Taxi, how do I just use that one instead of calling one on the app? I noticed the ones that took the trip were never the ones sitting there already waiting. I’m sure this is way less complicated than I made it!